Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

51.6°F

Measurement Time: Sunday, May 10, 2026, 5:15 AM PDT

Temperature Locations

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Local Points of Interest

Stanislaus National Forest; Colfax Spring, CA; Mather, CA; Harden Flat, CA

Tuolumne River

Station Name: TUOLUMNE R BL EARLY INTAKE NR MATHER CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 2,369 feet

Nearest Address:
Cherry Lake Rd
Groveland, CA 95321
Tuolumne County

GPS Coordinates: 37.8815908, -119.9701824

Nearby Water Temperatures

Tuolumne River, Groveland, CA (1.3 mi)
Cherry Creek, Groveland, CA (6.6 mi)
Tuolumne River, Groveland, CA (10.1 mi)
Tuolumne River, Groveland, CA (17.1 mi)
Merced River, Yosemite Valley, CA (24.7 mi)
Middle Fork San Joaquin River, Mammoth Lakes, CA (51.3 mi)
Deadman Creek, Mammoth Lakes, CA (57 mi)
Hot Creek, Mammoth Lakes, CA (62.8 mi)
Hot Creek, Mammoth Lakes, CA (63.4 mi)
San Joaquin River, Friant, CA (63.4 mi)
Hot Creek, Mammoth Lakes, CA (64.6 mi)
Trout Creek, South Lake Tahoe, CA (71.7 mi)
Upper Truckee River, South Lake Tahoe, CA (71.9 mi)
General Creek, Tahoma, CA (81.3 mi)
South Fork American River, Rescue, CA (82.9 mi)

Weather for Groveland, California

Current Weather

78.1°F
Sunny
Sunny
79.5°F
79.5°F
52%
WSW 5.8 mph
6.7 mph
78.1°F
59°F
0 in
0%
6 mi
1013 mbar
8.8

Five Day Weather Forecast

Sunny
Sun
H: 82°F
L: 60°F
Sunny
Mon
H: 86°F
L: 65°F
Sunny
Tue
H: 87°F
L: 66°F
Sunny
Wed
H: 73°F
L: 51°F
Sunny
Thu
H: 66°F
L: 47°F

Air Quality

AQI: 1 - Good
PM2.5: 8.45 μg/m3
PM10: 16.95 μg/m3
Carbon Monoxide: 187.85 μg/m3
Nitrogen Dioxide: 5.85 μg/m3
Sulphur Dioxide: 2.35 μg/m3
Ozone: 107 μg/m3

Astronomical

Sunrise: 5:54 AM
Sun Transit: 12:56 AM
Sunset: 7:59 PM
Daylight: 14 hrs 5 mins
Moonrise: 2:25 AM
Moon Transit: 7:49 AM
Moonset: 1:23 PM
Moon Phase: Last Quarter
Moon Illumination: 26.2%

Best Times for Fishing or Hunting

Major Periods

7:19 AM - 9:49 AM
3:34 PM - 6:04 PM

Minor Periods

12:53 AM - 2:23 PM
1:55 AM - 3:25 AM

Action Rating: 2 out of 5

Heat Advisory issued May 10 at 3:54AM PDT until May 12 at 8:00PM PDT by NWS Hanford CA

Effective: Sun May 10, 2026, 3:54 AM
Expires: Sun May 10, 2026, 12:00 PM

* WHAT...High temperatures up to 102 with widespread Moderate HeatRisk expected. Areas of Major HeatRisk will impact portions of the foothills where the thermal belt exists overnight and in urban areas including Fresno. * WHERE...A portion of central California. * WHEN...From 11 AM Monday to 8 PM PDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.
Sunday, May 10, 2026

Weather Forecast

Sunny
81.7°F
59.9°F
70.4°F
54%
0 in
0%
0%
7.6 mph
9.5


Air Quality

AQI: 1 - Good
PM2.5: 8.36 μg/m3
PM10: 14.17 μg/m3
Carbon Monoxide: 174.29 μg/m3
Nitrogen Dioxide: 6.5 μg/m3
Sulphur Dioxide: 2.14 μg/m3
Ozone: 84.24 μg/m3

Astronomical

Sunrise: 5:54 AM
Sun Transit: 12:56 AM
Sunset: 7:59 PM
Daylight: 14 hrs 5 mins
Moonrise: 2:25 AM
Moon Transit: 7:49 AM
Moonset: 1:23 PM
Moon Phase: Last Quarter
Moon Illumination: 26.2%

Best Times for Fishing or Hunting

Major Periods

7:19 AM - 9:49 AM
3:34 PM - 6:04 PM

Minor Periods

12:53 AM - 2:23 PM
1:55 AM - 3:25 AM

Action Rating: 2 out of 5

Monday, May 11, 2026

Weather Forecast

Sunny
85.9°F
65.1°F
75.2°F
41%
0 in
0%
0%
7.8 mph
9.5


Air Quality

AQI: 1 - Good
PM2.5: 7.23 μg/m3
PM10: 12.99 μg/m3
Carbon Monoxide: 163.81 μg/m3
Nitrogen Dioxide: 6.65 μg/m3
Sulphur Dioxide: 1.75 μg/m3
Ozone: 84.56 μg/m3

Astronomical

Sunrise: 5:53 AM
Sun Transit: 12:56 AM
Sunset: 8:00 PM
Daylight: 14 hrs 7 mins
Moonrise: 2:50 AM
Moon Transit: 8:34 AM
Moonset: 2:28 PM
Moon Phase: Last Quarter
Moon Illumination: 16.9%

Best Times for Fishing or Hunting

Major Periods

8:04 AM - 10:34 AM
4:19 PM - 6:49 PM

Minor Periods

1:58 PM - 3:28 PM
2:20 AM - 3:50 AM

Action Rating: 2 out of 5

Tuesday, May 12, 2026

Weather Forecast

Sunny
86.9°F
66.2°F
75.7°F
37%
0 in
0%
0%
8.5 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 7.38 μg/m3
PM10: 14.19 μg/m3
Carbon Monoxide: 171.21 μg/m3
Nitrogen Dioxide: 6.67 μg/m3
Sulphur Dioxide: 1.81 μg/m3
Ozone: 90.36 μg/m3

Astronomical

Sunrise: 5:52 AM
Sun Transit: 12:56 AM
Sunset: 8:01 PM
Daylight: 14 hrs 9 mins
Moonrise: 3:14 AM
Moon Transit: 6:41 PM
Moonset: 3:34 PM
Moon Phase: Waning Crescent
Moon Illumination: 9.3%

Best Times for Fishing or Hunting

Major Periods

6:11 PM - 8:41 PM
6:11 PM - 8:41 PM

Minor Periods

3:04 PM - 4:34 PM
2:44 AM - 4:14 AM

Action Rating: 2 out of 5

Wednesday, May 13, 2026

Weather Forecast

Sunny
72.9°F
51.2°F
63.5°F
51%
0 in
0%
0%
13 mph
5


Air Quality

AQI: 1 - Good
PM2.5: 10.87 μg/m3
PM10: 24.31 μg/m3
Carbon Monoxide: 168.85 μg/m3
Nitrogen Dioxide: 6.95 μg/m3
Sulphur Dioxide: 2.4 μg/m3
Ozone: 92.68 μg/m3

Astronomical

Sunrise: 5:51 AM
Sun Transit: 12:56 AM
Sunset: 8:02 PM
Daylight: 14 hrs 10 mins
Moonrise: 3:39 AM
Moon Transit: 10:05 AM
Moonset: 4:45 PM
Moon Phase: Waning Crescent
Moon Illumination: 3.8%

Best Times for Fishing or Hunting

Major Periods

5:52 PM - 8:22 PM
9:35 AM - 12:05 AM

Minor Periods

4:15 PM - 5:45 PM
3:09 AM - 4:39 AM

Action Rating: 3 out of 5

Thursday, May 14, 2026

Weather Forecast

Sunny
65.7°F
46.9°F
56.1°F
57%
0 in
0%
0%
9.2 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 7.65 μg/m3
PM10: 17.48 μg/m3
Carbon Monoxide: 153.06 μg/m3
Nitrogen Dioxide: 5.09 μg/m3
Sulphur Dioxide: 2.25 μg/m3
Ozone: 96.54 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 12:56 AM
Sunset: 8:03 PM
Daylight: 14 hrs 12 mins
Moonrise: 4:07 AM
Moon Transit: 10:56 AM
Moonset: 5:58 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.7%

Best Times for Fishing or Hunting

Major Periods

6:43 PM - 9:13 PM
10:26 AM - 12:56 AM

Minor Periods

5:28 PM - 6:58 PM
3:37 AM - 5:07 AM

Action Rating: 2 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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